using System;

using static System.Console;

​

​

string username;

string password;

bool validPassword = false;

WriteLine("Please enter a user name and password. Your password must be 10 characters or longer, contain either $, #, or &, and end with a number.");

WriteLine("Username:");

username = ReadLine();

​

while(!validPassword)

{

    WriteLine("Password:");

    password = ReadLine();

    if (!password.Contains("#") && !password.Contains("$") && !password.Contains("&"))

    {

        WriteLine("Your password must contain either $, #, or &. Please type a new password.");

    }

    else if (password.Length < 10)

    {

        WriteLine("Your password must be 10 characters or more. Please type a new password.");

    }

    else if (!password.EndsWith("1") && !password.EndsWith("2") && !password.EndsWith("3") && !password.EndsWith("4") && !password.EndsWith("5") 

             && !password.EndsWith("6") && !password.EndsWith("7") && !password.EndsWith("8") && !password.EndsWith("9") && !password.EndsWith("0"))

    {

        WriteLine("Your password must end with a number. Please type a new password.");

    }       

    else

    {

        validPassword = true;

    }

}

​

​